Locking mechanism



Sept. 24,1946. 5. LARSSQN 2,403,024

LOCKING MECHANISM r Filed Jan. 15, 1945 4 Sheets-Sheet 1.

' 22 y m I z hu -57 0 43 35 /n ven for "S ven-Larsson A zfomey Sept. 24, 1946.

LOCKING MECHANISM Filed Jan. 15, 1945 ,4 Sheeis-Sheet 2 [2 H913 /4 Mvemor Attorney s. LARSSON 2,408 ,@24

I mix 5 35 15 Patented Sept. 24, 1946 UNITED STATES PATENT OFFICEv Application January 15,1945, Serial No. 572,942

In Sweden November 16, .1943

The present invention refers to a locking mechanism of the type, comprising a tubular cylinder enclosing a slid-ably fitted bolt, the retraction of which is effected against spring action by means of a rotatable disk disposed behind the locking bolt in the tubular cylinder. Such locks are known per se and are advantageous inasmuch as the mounting thereof incurs but low costs, it being'possible to bore a hole in a door for the reception of the tubular cylinder and avoid otherwise necessary 'chiselling out of the mortise.

A' more particular object of the invention is to provide a simplified and cheaper form of such a locking mechanism which, if desired, may be provided with a tumbler for the bolt.

The special characterizing feature of invention is that the disk bears on a bearing member pro- 10 Claims. (Cl. 70150) Fig. 27 is a View of those parts rigidly conneoted to the bolt in the locking mechanism.

Fig. 28 is a view of another form of the bolt and part of the elements rigidly connected thereto.

Fig. 29 is a section along the line XXIXXXIX in Fig. 28.

Fig. 30 is another form of the abutment element. 7

Fig. 31 is a section along the line XXXI-XXXI in Fig. 30.

vided between the disk and the bolt in the tubular cylinder and that the diskis provided with a backwardly or inwardly extending camadapted to cooperate with a cam track on a member con nected to the bolt.

So that the invention may be readily understood and easily put into effect a preferred enibodiment thereof is illustratedby way of example only, in the accompanying drawings inwhich:

Fig. 1 is a vertical section through door-case, a door and a lockingmeohanism. according to the invention mounted therein, the bolt being shown in looking position.

Fig. 2 is a similar sectional View. the lock,being in unlocking or receded position. I

Fig. 3 shows a horizontal section through the parts shown in Figs. 1 and 2.

Fig. 4 is a side View of. the lock housing.

Figs. 5 and 6 show two different cross sections taken along the lines V-V and VI--VI respectively in Fig. 1,

Fig. 7 shows a plan view of an abutment element for a spring adapted to bear on the bolt.

Fig. 8 shows a section ofthe bolt. I

Fig. 9 is a piece of sheet metal intended to b doubled along the dotted lines in th middle and thereby form a guide.

Figs. 10 and 11 are a side view and a cross section respectively of a lateral bar.

Figs. 12-25 show seven other component parts of the locking mechanism, partly as seen from above and partly asseen from the side, to wit, a bearing member, a locking element, a stemmed member, a disk, an end-plate, a stud, and a tubular lock housing.

Fig. '26 shows a longitudina1 section of the outer cylinder shown in Figs. 24 and 25,

Figs. 32 and 33 show two difierent forms of the key-bit.

Fig. 34 shows another form of the disk and the end plate.

In Figs. 1-3 the reference numeral I designates the door in one of the vertical edges of which the locking mechanism according to the invention is mounted, and which at the opposite edge thereof is hinged on the other side (not shown) of the door case 2. The door case 2 is provided with a recess '3 registering with a bolt 4, adapted to protrude into the recess when the door is closed. The bordering edges of the recess 3 are strengthened inthe usual way by means of a mounting 5 adapted to be securedin the door case 2 by means of screws or the like (not shown).

'The door I (Fig. 3) is provided with two horizontal intersecting bores or mortises 8,1, of which the one 6 extending from the edge ofthe door is adapted to receive the lock housing, while The jreferencenumeral l2 designates a plate which surrounds the mouth of the mortises I, Ill, and which is fastened to the door I by one or several screws I3; or by any other suitable means.

The lock housing consists of an externally and I internally tubular cylinder I4 adapted to enclose all parts of the locking mechanism. In order to enable the insertion of the key I I and the spindle 8 of the handle 9 into the lockin mechanism, the cylinder M. is provided at both of its two opposite sides with two separate slots. or with a common longitudinal'slot I5, as will be apparent from Figs. 4, 6, 24 and 26.

The cylinder I A is provided at that end facing the door case 2 with an annular outer flange I6 adapted to be let into the edge of the door in a comparatively shallow recess which is coaxial with the mortise 6 but of greater diameter than the latter. In the form shown, the flange I6 is not provided with any screw holes for fastening the flange to the edge of the door, but serves as an ordinary stop flange. The flange may, of course. be provided with screw holes, but as no material advantage is to be gained from securing it by screws or the like, the provision of such holes would only unnecessarily enhance the manufacturing costs of the lock. Moreover, the flange l6 may be altogether omitted because the locking mechanism, as will be apparent from the following description, may be held in the slot by means of a handle 9 alone.

The cylinder 14 is provided at its other end with an inwardly directed flange l1 adapted to provide an abutment for certain non-displaceable parts of the locking mechanism in a. manner described herebelow. i

As will be apparent from Fig. 8 the bolt 4 has a backwardly or inwardly directed bifurcated extension, the two forks l8, l9 of which (FigS.- 3, 2'7, 28 and 29) grip the end ofa guide, consistingoftwo'parallel elements or shanks 20, 25. This guide is preferably made from a single blank, which is doubled along dash and dot lines intermediate its ends, as indicated in Fig. 9. Between the shanks 20, 2| there is an interjaoent member 22 which, as will. be apparent from Figs. 1, 2, 16, 27, 28 and 29 is provided at its inward end with an eccentrically located, inwardly extending stem 23 provided at its free end with an oblique surface 24, the purpose of which will be apparent later on in the description.

The parts l8-22 are provided with holes 25, 26 and 21 through which extends a stud 28 by means of which the parts Iii-22 are held together. Each of the elements or shank 20 and 2| is provided with a longitudinal slot 23 and 35 respectively, adapted to permit the passage of interalia the key I! and'the spindle 8 of the door handle 9 therethrough. Towards that end proximatethe holes 26, the slots 29 and 30 are reduced to slits 3| and 32 respectively, the purpose,of;which will be apparent later on in the description. i

-At one end of the shanks 20 and 2| there is in spaced relationship to theholes 29' and 30 a 4 of a pin 31 extending through the holes 38, 38 and 43 provided in the parts 20, 21 and 35 respectively. The outwardly facing edge of the endplate 35 is provided with a recess 4| in which a triangular cam portion of a disk 43 is adapted to engage. The disk 43, one form of which is shown in Figs, 18 and 19 and another in Fig. 34, is provided with a rectangular slot 64 adapted to permit the passage of the likewise rectangular spindle 8 of the handle 3. The form of the disk shown in Fig. 34 is most advantageous if the locking mechanism is to be adaptable for righthandedly as well as for lefthandedly hinged doors, the locking mechanism then being adaptable for either sort of door simply by turning the outer cylinder I 4.

At that circumferential portion facing the mouth of the mortise, the disk bears on the inwardly facing edge of a bearing member shown by way of example in Figs. 12 and 13. The bearing member 46 is rigidly connected to two slightly channeled lateral bars 41 (Figs. 10, 11, 31 and 32) disposed at either side of the shanks 20, 2|. The one end of the lateral bars 4'! is adapted always to abut the inner flange ll of the tubular casing M, the other end of the lateral bars being adapted normally to form an abutment for a resiliently fixed element when the locking mechanism is as- 1 22 and 23, rectangular. In both forms shown in the drawings the bars 4'! are moveover provided with key holes 5|, 52 and a hole 53 for the spindle 8 of the door handle 9. In the form shown in Figs. 30 and 31 the outer sides of the lateralbars 41 are moreover shaped with horizontal recesses 54 extending inwardly fromthe outwardly facing edge of the bars, theinner side of the bars 41 being provided with one or more projections, studs,

wards'55 or the like which may be produced e. g. by pressing. The purpose ofthe recesses 54 and the projections 55 willbe described together with manner or whether it is completely assembled,

the other end of the spring 34 is in continuous abutting engagement with an inwardly facing ledge formed by the inner surface of the bolt and a reduced portion of the bolt, which portion extends inwards and is adapted to guide the spring 34 (see Figs. 1-3, 5, 6, 8 and 2'7). As the guiding of the spring 34 by the shanks 23, 2! and by the inner wall of the tubular casin 14 will in most cases be sufiicient, the bolt may also take the form shown in Figs. 28, 29, in which'it is given a uniform diameter, and in which the spring abuts the inwardly facing end surface of the bolt.- The last-mentioned form of the bolt is cheaper to fabricate andmore practical in use inasmuch as it'facilitates the insertion of the stud 28, because the spring does then not obstruct the hole 26 adapted to receive the stud 28.

-Atthe opposite end of the guide member 23, 2|, is a rigidly mounted end-plate 35, one form of whichis illustrated in Figs. 20 and 21, another form thereof being shown in Fig. 34. The end-plate35, one end of which abuts the doubled portion 36 (Fig. 9) of the guide member 20, 2|, is fastened to the guide member 20, 21 by means the outer ends of the channel-like bars 41. The

locking element 56 is adapted to be actuated by a key I I so that it may be moved from that position in which it is shown in solid lines in Fig. 1 and in which the bolt 4 cannot recede further than to a position in which the stem 23 of anintermediate element 22 abuts the outer edge of the locking element, to that position shown with dotted lines in Fig. 1, and with solid lines in Fig. 2, in which latter position the bolt 4 may be totally withdrawn from the recess 3 in the door case 2. The locking element 55 is fixed in its two locking positions by means of its two extremities 58, 59 engaging one of two pairs of notches 60, 6| provided in the outwardly facing edge of the bearing member 46. In order to facilitate the passage of the locking element past the stem 23 of the intermediate element 22 during the travel of the locking element from the one position to the members and operatively connected to the disk,

and a handle mountedon the spindle.

4. A locking mechanism comprising a tubular lock'casing mounted in a door; a bolt slidably mounted within the lock casing; a member connected to the bolt and extending into the lock casing, said member comprising a pair of parallel slotted guide elements; a plate mounted interjacent the inner 'ends of the slotted guide elements and provided with a cam track, means for rigidly securing said plate in position against movement, a fixed bearing member intermediate the bolt and the plate; a, disk having an inwardly directed cam portion and adapted to bear On said bearing member and actuatingly to engage the cam track on the plate, the disk and the bearing member being also interjacent the slotted guide elements, an abutment element; a sprin extending between and bearing on the abutment element and the proximate end surface of the bolt, the abutment element being shiftable a limited amount along the guide elements against the action of the spring, from a normally fixed position, a spindle extending into the casing and operatively connected to the disk, and a handle mounted on the spindle.

5. A locking mechanism comprising a tubular lock casing mounted in a door; a boltslidably mounted within the casing; a member connected to the bolt and extending into the lock casing, said member comprising a pair of parallel slotted guide elements; a plate mounted interjacent the inner ends of the slotted guide elements and provided with a cam track, means for rigidly securing said plate in position against movement, a fixed bearing member intermediate the bolt and the plate; a disk having an inwardly directed cam portion and adapted to bear on said bearing member and actuatingly to engage the cam track on the plate, the disk and the bearing member being also interjacent the slotted guide elements, an abutment element, a pair of lateral bars abutting the inwardly facing surface of the abutment element and the inner end of the tubular lock casing, a spring extending between and bearing on the abutment element and the proximate end surface of the bolt, the abutment element being shiftable a limited amount along the guide elements against the action of the spring from a normally fixed position in which it is held by the lateral bars, a spindle extending into the casing and operatively connected to the disk, and a handle mounted on the spindle.

6. A locking mechanism comprising a tubular lock casing mounted in a door; a bolt slidably mounted within the casing; a member connected to the bolt and extending into the lock casing, said member comprising a pair of parallel slotted guide elements; a plate mounted interjacentthe inner ends of the slotted guide elements and provided with a cam track,- means for rigidly securing said plate in position against movement, a fixed, slotted bearing member intermediate the bolt and the plate; a disk having an inwardly directed cam portion and adapted to bear on the bearing member and actuatingly to engage the cam track on the plate, the disk and the cam mounted within the lock casing; a stem extending inwardly from the bolt; a member connected to the bolt and extending into the lock casing; said member comprising a pair of parallel slotted guide elements, a plate mounted interjacent the inner ends of the guide elements and provided with a cam track, means for rigidly securing said plate in position against movement, a fixed bearing member intermediate the bolt and the plate; a disk having an inwardly directed cam portion adapted to bear on said bearing member and actuatingly to engage the cam surface on said plate, the disk and the bearing member being interjacent the slotted guide members, a slotted abutment element, a spring bearing on the slotted abutment and the proximate end surface of the bolt, the slotted abutment being shiftable a limited amount along the guide elements against the action of the spring, from a normally fixed position, a locking element disposed between the bearing member and the slotted abutment element and adapted to be shifted by means of a key transversely of the lock casing, from an inoperative position to a position in which it obstructs recession of the stem through a registering slot in the slotted abutment element, a spindle extending into the tube casing and operatively connected to the disk; and a handle mounted on the spindle.

8. A locking mechanism comprising a tubular lock casing mounted in a door; a bolt slidably mounted within the lock; a stem extending inwardly from the bolt; a member connected to the bolt and extending into the lock casing, said member comprising a pair of slotted, parallel guide elements; an end-plate fixed interia cnt the inner end of the guide elements and provided with a'cam track; a fixed bearing member intermediate the bolt and the plate; a disk having an inwardly directed cam portion and adapted to bear on said bearing member and actuatmember being also interjacent the slotted guide elements; an abutment element; a pair of slotted, lateral bars abutting the inwardly facing surface of the abutment element and the inner end sur- 7 face of the tubular lock casing; a stud extending ingly to engage the cam surface on said endplate, the disk and the bearing member being disposed also interjacent the slotted guidemembers, a slotted abutment element, a spring bearing on the slotted abutment element and the relatively proximate end surface of the bolt, the slotted abutment element being shiitable a limited amount along the guide elements against the action of the spring, from a normally fixed position; a substantially U-like locking element located between the bearing member and the slotted abutment element and adapted to be shifted transversely of the lock casing by the actuating engagement of the key-bit with the inner U-surface, from an inoperative position to a position in which it obstructs recession of the stem through a slot in the slotted abutment element, a spindle extending into the casing and operatively connected to the disk; and a handle mounted on .the spindle.

9. A locking mechanism comprising a tubular lock casing mounted in a door; a bolt slidably mounted within thelock; a stem extending inwardly from the bolt; a member connected to the bolt and extending into the lock casing, said member comprising a pair of slotted, parallel guide elements; an end-plate fixed interjacent the inner ends of the guide elements and provided with a cam track; afixed notched bearing member intermediate the bolt and the plate; a disk having an inwardly directed cam portion and adapted to bear on said bearing member and actuatingly to engage the cam surface on said end-plate, the disk and the bearing member being disposed also interjacent the slotted guide members, a slotted abutment element, a spring bearing on the slotted abutment element and the relatively proximate end surface of the bolt, the slotted abutment element being shiftable a limited amount along the guide elements against the action of the spring, from a normally fixed position; a substantially U-like locking element disposed between the notched bearing member and the slotted abutment element and adapted by means of its extremities to cooperate with the notched bearing member and to be shifted transversely of the lock casing by the actuating engagement of a key-bit with the inner U-like surface, from an inoperative position to a position in which it obstructs recession of the stem through a registering slot in the slotted abutment; a spindle extending into the casing and operatively connected to the disk, and a handle mounted on the spindle.

10. A locking mechanism comprising a tubular casing mounted in a door; a bolt slidably mount ed within the casing; a stem extending inwardly from the bolt; a member connected to the bolt and extending into the lock casing, said member comprising a pair of slotted parallel guide elements; a plate mounted interjacent the inner ends of the slotted guide elements and provided with a cam track, means for rigidly securing said plate in position against movement, a fixed slotted bearing member intermediate the bolt and. the plate; a disk having an inwardly directed cam portion and adapted to bear on the bearing member and actuatingly to engage the cam track on the plate; the disk and the cam member being also interjacent the slotted guide elements; a spring bearing on the inner end surface of the bolt and the outwardly facing surface of fixed, slotted bearing member; a slotted abutment element adapted to be guided by the slotted, parallel guide elements, a pair of warded and slotted lateral bars abutting the inwardly facing surface of the slotted abutment element and the inner end wall of the tubular casing, the slotted abutment element thereby being held in a definite position from which it may be shifted a limited amount along the guide elements by a suitably Warded key-bit against the action of the spring, from an inoperative position in Which it is normally held by the Warded and slotted bars to an operative position, in which it obstructs the recession of the stem, through a registering slot in the slotted abutment; a spindle extending into the casing and operatively connected to the disk; and a handle mounted on the spindle.

SVEN LARSSON. 

